adds configure option '--with-pic'

configure.ac

@@ -38,6 +38,11 @@ AC_ARG_ENABLE([rpaths],
      [link with automatically generated RPATH flags @<:@default=yes@:>@])], [],
   [enable_rpaths=yes])
 
+AC_ARG_WITH([pic],
+  [AS_HELP_STRING([--with-pic],
+     [compile PIC objects @<:@default=auto@:>@])], [],
+  [with_pic=auto])
+
 dnl Tests for the C compiler:
 dnl   Make sure conftest.dSYM is removed when configured on MacOS with
 dnl   CFLAGS='-g':
@@ -59,9 +64,11 @@ AS_VAR_IF([ac_cv_prog_cc_c99], [no],
   [AC_MSG_FAILURE([unable to detect C compiler flag needed to accept ISO C99])])
 m4_popdef([AC_PROG_CC_C_O])dnl
 AC_C_RESTRICT
+ACX_COMPILER_CC_VENDOR_SIMPLE
 AS_VAR_IF([enable_rpaths], [yes],
-  [ACX_COMPILER_CC_VENDOR_SIMPLE
-   ACX_SHLIB_CC_RPATH_FLAG])
+  [ACX_SHLIB_CC_RPATH_FLAG])
+AS_IF([test "x$with_pic" != xno],
+  [ACX_SHLIB_CC_PIC_FLAG])
 
 dnl Tests for static library generation tools:
 AC_ARG_VAR([AR], [archiver command])
@@ -132,9 +139,11 @@ ACX_FC_INCLUDE_FLAG_PP([AC_SUBST([FCPPINC], ["$acx_cv_fc_pp_include_flag"])])
 ACX_LANG_MACRO_FLAG([AC_SUBST([FCPPDEF], ["$acx_cv_fc_macro_flag"])])
 ACX_FC_MODULE_CHECK([ISO_C_BINDING])
 ACX_FC_PP_COMMENTS([], [:])
+ACX_COMPILER_FC_VENDOR_SIMPLE
 AS_VAR_IF([enable_rpaths], [yes],
-  [ACX_COMPILER_FC_VENDOR_SIMPLE
-   ACX_SHLIB_FC_RPATH_FLAG])
+  [ACX_SHLIB_FC_RPATH_FLAG])
+AS_IF([test "x$with_pic" != xno],
+  [ACX_SHLIB_FC_PIC_FLAG])
 
 AS_IF([test "`cd $srcdir && pwd`" != "`pwd`"],
   [AC_SUBST([yac_fcisrc], [" ${FCPPINC}\$(srcdir)"])dnl
@@ -652,22 +661,20 @@ AC_ARG_ENABLE([python-bindings],
      [enable Python bindings @<:@default=no@:>@])], [],
   [enable_python_bindings=no])
 
-dnl Options --enable-lib-core-only and --enable-python-bindings are
-dnl incompatible. If both of them equal to 'yes', it is the user's choice and we
-dnl can stop with an error:
-AS_IF([test x"${enable_lib_core_only}${enable_python_bindings}" = xyesyes],
-  [AC_MSG_ERROR([options '--enable-lib-core-only' and dnl
+AS_VAR_IF([enable_python_bindings], [yes],
+  [AS_VAR_IF([enable_lib_core_only], [yes],
+     [AC_MSG_ERROR([options '--enable-lib-core-only' and dnl
 '--enable-python-bindings' are incompatible])])
+   AS_VAR_IF([with_pic], [no],
+     [AC_MSG_ERROR([options '--without-pic' and '--enable-python-bindings' dnl
+are incompatible])],
+     [with_pic=yes])])
 
 AM_CONDITIONAL([ENABLE_PYTHON_BINDINGS],
   [test x"$enable_python_bindings" = xyes])
 
 AS_VAR_IF([enable_python_bindings], [yes],
-  [ACX_SHLIB_CC_PIC_FLAG
-   AC_SUBST([PIC_CFLAGS], [$acx_cv_c_pic_flag])
-   ACX_SHLIB_PIC_FLAGS_CHECK([$PIC_CFLAGS], [], [PIC_CFLAGS=])
-dnl
-   AC_ARG_VAR([PYTHON], [Python interpreter command])dnl
+  [AC_ARG_VAR([PYTHON], [Python interpreter command])dnl
    ACX_PROG_SEARCH([PYTHON], [python3 python],
      [yac_python_try=dnl
 "$acx_candidate -c 'import sys; exit(sys.version_info@<:@0:2@:>@ < (3, 6))' dnl
@@ -758,10 +765,18 @@ AS_VAR_IF([enable_rpaths], [yes],
      ASX_VAR_APPEND_UNIQ([RPATH_FCFLAGS],
        ["$acx_cv_fc_rpath_flag$yac_L_arg"], [' '])
    done
-   AC_LANG_PUSH([Fortran])
+   AC_LANG_PUSH([Fortran])dnl
    ACX_SHLIB_RPATH_FLAGS_CHECK([$RPATH_FCFLAGS])
    AC_LANG_POP([Fortran])])
 
+AS_VAR_IF([with_pic], [yes],
+  [ACX_SHLIB_PIC_FLAGS_CHECK([$PIC_CFLAGS])
+   AC_SUBST([PIC_CFLAGS], [$acx_cv_c_pic_flag])
+   AC_LANG_PUSH([Fortran])dnl
+   ACX_SHLIB_PIC_FLAGS_CHECK([$PIC_FCFLAGS])
+   AC_SUBST([PIC_FCFLAGS], [$acx_cv_fc_pic_flag])
+   AC_LANG_POP([Fortran])])
+
 AS_IF([test -n "$LDFLAGS"], [YAC_PKGCONF_CLIBS="$LDFLAGS $YAC_PKGCONF_CLIBS"])
 AS_IF([test -n "$LIBS"], [AS_VAR_APPEND([YAC_PKGCONF_CLIBS], [" $LIBS"])])
 

contrib/Makefile.am

@@ -67,6 +67,8 @@ AM_CFLAGS = \
     $(YAXT_CFLAGS) \
     $(NETCDF_CFLAGS)
 
+AM_FCFLAGS = $(PIC_FCFLAGS)
+
 $(mo_yac_utils_mod): mo_yac_utils.$(OBJEXT)
 	@if test ! -f $@; then rm -f $<; $(MAKE) $<; fi
 

src/core/Makefile.am

@@ -159,6 +159,8 @@ AM_CFLAGS = \
     $(NETCDF_CFLAGS) \
     $(LAPACK_CFLAGS)
 
+AM_FCFLAGS = $(PIC_FCFLAGS)
+
 $(mo_yac_core_mod): mo_yac_core.$(OBJEXT)
 	@if test ! -f $@; then rm -f $<; $(MAKE) $<; fi
 

src/mci/Makefile.am

@@ -44,6 +44,8 @@ AM_CFLAGS = \
     $(FYAML_CFLAGS) \
     $(MTIME_CFLAGS)
 
+AM_FCFLAGS = $(PIC_FCFLAGS)
+
 yac_finterface.$(OBJEXT): $(mo_yac_finterface_mod)
 $(mo_yac_finterface_mod): mo_yac_finterface.$(OBJEXT)
 	@if test ! -f $@; then rm -f $<; $(MAKE) $<; fi